Q95 of 400 Page 136

CuSO4 (aq) + Fe (s) → FeSO4 (aq) + Cu (s)

FeSO4 (aq) + Zn (s) → ZnSO4 (aq) + Fe (s)


On the basis of the above reactions, indicate which is most reactive and which is least reactive metal out of zinc, copper and iron.

On the basis of the above reactions we can say that zinc is most reactive metal then copper and iron. On the other hand copper is least reactive then that of the zinc and iron.

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93 Why do they differ in this property? 94 In a solution of lead acetate, a strip of metal M was dipped. After some time, lead from the solution was deposited on the metal strip. Which metal is more reactive, M or lead? 96 Which of the following reactions will not occur ? Why not?

(a) MgSO4 (aq) + Cu (s) → CuSO4 (aq) + Mg (s)


(b) CuSO4 (aq) + Fe (s) → FeSO4 (aq) + Cu (s)


(c) MgSO4 (aq) + Fe (s) → FeSO4 (aq) + Mg (s)

 97 In nature, metal A is found in a free state while metal B is found in the form of its compounds. Which of these two will be nearer to the top of the activity series of metals?